<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>

   <style>
        div{
            font-size: 150px;
          width: 700px;
          height: 700px;
          color: #ccc;
          background-color:#ccc;  
          text-shadow: -1px -1px 1px #000,1px 1px 1px #fff;
        }
         .vv:nth-child(2){
            font-size: 150px;
          width: 700px;
          height: 700px;
          color: #ccc;
          background-color:#ccc;  
          text-shadow: 1px 1px 1px #000,-1px -1px 1px #fff;
         }
   </style>
</head>
<body>
    <div>
     点击上面蓝色的字添加关注
    </div>
     <div class="vv">凹凸文字</div>
</body>
</html>